Logically speaking, we always must live in a world where past existential threats to humanity were avoided (including super-volcanoes, asteroids), but that says nothing about the possibility of future existential threats wiping out humanity.
Spoiler (including why it's related to your post) since I think it's easy to miss what this is: Vg'f n obk gung, jura bcrarq, qrfgeblf gur havirefr. Fvapr nccneragyl guvf obk yvirf va n znal-jbeyqf havirefr, vg'f onfvpnyyl n havirefr-fpnyr Dhnaghz Fhvpvqr qrivpr.
http://www.rot13.com/index.php , for your convenience.
And yes, I'm extrapolating a bit, but given the rest of the SCP-universe (inasmuch as there is a such a thing), it's a pretty reasonable conclusion. If it's wrong to you, well, it's right to me, Hail Fanon, All Hail Discordia.
There's no reason a much diminished humanity concentrated in the southern hemisphere couldn't be marking the thirtieth anniversary of War Day today, if things had gone a bit differently.
"In Global Catastrophic Risks 25 leading experts look at the gravest risks facing humanity in the 21st century, including asteroid impacts, gamma-ray bursts, Earth-based natural catastrophes, nuclear war, terrorism, global warming, biological weapons, totalitarianism, advanced nanotechnology, general artificial intelligence, and social collapse. The book also addresses over-arching issues - policy responses and methods for predicting and managing catastrophes. "
Talking about st. Peter and Paul, it's not only celebrated by the orthodox churches, but also in the west:
Though I did hear about the "Saint Mother Mary of Egypt" day which was about every second Friday if you were to believe a heavy-drinking madam two floors down from where we lived.
Yep, sounds like a Russian holiday alright :)
The context is that it's the oldest inside Russian joke to make up random occassions when drinking. You feel like having a drink, but can't justify it - no problem, drink to the revitalizing power of parsley or to bid spring farewell or something as silly.
It´s in my calendar, and I´ve already wished all my friends happy Petrov day (via Facebook).
-$30,000 from the Dresden Prize
-$1,000 from SF's World Citizen Award (does that even cover airfare from Russia?!)
Preventing nuclear disaster, it seems, is an undervalued skill. Mr. Petrov needs to fire his publicist.
My favourite anecdote is the code on all warheads on the US' Minuteman fleet being set to 00000000 as an exercise in simultaneously conforming to and circumventing requirements for PALs (locks to forbid misuse).
 : http://www.motherjones.com/politics/2013/08/eric-schlosser-c...
One fascinating one was a U2 getting lost on the way to the North Pole due to the Northern Lights and flying back into the Soviet Union just at the wrong time - alarming the Soviets and resulting in fighters being sent up by the US to protect the ailing U2. Unfortunately, due to the US being at Defcon 2 the fighters were only armed with nuclear air-to-air missiles.... The relief (for a number of reasons) the U2 pilot felt when he eventually landed was, understandably, rather intense!
Amazing book about a ghastly time.